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Excavator hydraulic system, excavator and excavator control method

A hydraulic system and excavator technology, applied in mechanically driven excavators/dredgers, fluid pressure actuation system components, fluid pressure actuation system testing, etc. Movement incoordination, etc.

Active Publication Date: 2020-07-03
SANY HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the boom is lifted to the highest position and cannot continue to lift, the flow in the main oil circuit of the slewing will suddenly increase, and the slewing will suddenly accelerate, resulting in uncoordinated compound actions, which are prone to danger when loading the vehicle

Method used

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  • Excavator hydraulic system, excavator and excavator control method

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Embodiment approach

[0033] As another implementation manner, the detection component includes a pressure sensor, which is installed in the rodless cavity of the boom cylinder and is connected to the controller 500 for signals.

[0034] Specifically, the pressure sensor is fixedly installed in the rodless chamber of the boom cylinder for detecting the pressure in the rodless chamber. The controller 500 is signal-connected with the pressure sensor, and the pressure sensor transmits the detected pressure value to the controller 500 in real time.

[0035] When the piston rod moves to the highest position, the pressure in the rodless chamber is a constant value, so the maximum pressure value of the rodless chamber can be set in the controller 500. During the lifting process of the piston rod of the boom cylinder, the pressure sensor detects in real time The pressure in the non-sensing chamber transmits the detected pressure value to the controller 500. When the detected pressure value is equal to the ...

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Abstract

The invention provides an excavator hydraulic system, an excavator and an excavator control method, and relates to the technical field of engineering machinery. The excavator hydraulic system comprises an oil supply assembly, a rotary motor, a boom cylinder, a detection assembly and a controller, wherein the oil supply assembly communicates with the rotary motor and the boom cylinder respectively;the detection assembly is used for detecting whether a piston rod of the boom cylinder moves to the highest position or not and transmitting a detection signal to the controller; and the controller is used for controlling the oil supply amount of the oil supply assembly to the rotary motor according to the detection signal. According to the excavator hydraulic system, the technical problem that the compound actions of an excavator are not coordinated in the related art is solved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an excavator hydraulic system, an excavator and an excavator control method. Background technique [0002] An excavator, also known as an excavating machine, is an earth-moving machine that uses a bucket to dig materials higher or lower than the bearing surface, and loads the materials into transport vehicles or unloads them to the stockyard. The materials excavated by the excavator are mainly soil, coal, sediment, and pre-loose soil and rock. Judging from the development of construction machinery in recent years, the development of excavators is relatively fast, and excavators have become one of the most important construction machinery in engineering construction. [0003] The hydraulic system of the excavator is equipped with the boom main oil circuit and the rotary main oil circuit. The flow distribution of the boom main oil circuit and the rotary main oil circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02F3/42E02F9/22F15B11/16F15B11/17F15B11/22F15B19/00F15B21/08
CPCE02F3/42E02F3/425E02F9/22E02F9/2203E02F9/2292F15B11/16F15B11/17F15B11/22F15B19/00F15B21/087F15B2211/78
Inventor 王守伏尹满义马卫强郭文博
Owner SANY HEAVY MACHINERY
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